panic: ip6_deletefraghdr: ext headers not contigous in mbuf 0xfffffe006e2b5800 m_len 40 >= offset 48 + 8

cpuid = 0
time = 9
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0057351ed0
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0057352030
vpanic() at vpanic+0x257/frame 0xfffffe00573521f0
panic() at panic+0xb5/frame 0xfffffe00573522b0
frag6_input() at frag6_input/frame 0xfffffe00573522f0
pf_normalize_ip6() at pf_normalize_ip6+0xd8b/frame 0xfffffe0057352450
pf_test() at pf_test+0xbc9/frame 0xfffffe0057352a00
pf_check6_in() at pf_check6_in+0xac/frame 0xfffffe0057352a50
pfil_mbuf_in() at pfil_mbuf_in+0x8c/frame 0xfffffe0057352a90
ip6_input() at ip6_input+0x16dd/frame 0xfffffe0057352cf0
swi_net() at swi_net+0x2b8/frame 0xfffffe0057352d90
ithread_loop() at ithread_loop+0x4ec/frame 0xfffffe0057352ef0
fork_exit() at fork_exit+0xcc/frame 0xfffffe0057352f30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0057352f30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 12 tid 100033 ]
Stopped at      kdb_enter+0x6e: movq    $0,0x25bea17(%rip)
db> 
db> set $lines = 0
db>